// running.c -- A useful program for runners
#include <stdio.h>
const int S_PER_M = 60;          // second in a minute
const int S_PER_H = 3600;        // second in an hour
const double M_PER_K = 0.62137;  // miles in a kilometer
int main(void) {
  double distk, distm;  // distance run in km and miles
  double rate;          // average speed in mph
  int min, sec;         // minutes and swconds for running time
  int time;             // running time in second only
  double mtime;         // time in second for one mile
  int mmin, msec;       // minutes and seconds for one mile

  printf("This program converts your time for a metric race\n");
  printf("to a time for running a mile and to your average\n");
  printf("speed in miles per hour.\n");
  printf("Please enter, in kilometers, the distance run.\n");
  scanf("%lf", &distk);  // %lf for type double
  printf("Next enter the time in minutes and seconds\n");
  printf("Begin by entering the minutes.\n");
  scanf("%d", &min);
  printf("Now enter the seconds.\n");
  scanf("%d", &sec);
  // converts time to pure seconds
  time = S_PER_M * min + sec;
  // converts.kilometers to miles
  distm = M_PER_K * distk;
  // miles per sec x sec per hour = mph
  rate = distm / time * S_PER_H;
  // time / distance = time per mile
  mtime = (double)time / distm;
  mmin = (int)mtime / S_PER_M;  // find whole minutes
  msec = (int)mtime % S_PER_M;  // find remaining second
  printf("You ran %1.2f km (%1.2f miles) in %d min, %d sec.\n", distk, distm,
         min, sec);
  printf("That pace corresponds to running a mile in %d min, ", mmin);
  printf("%d sec.\nYour average speed is %1.2f mph.\n", msec, rate);

  return 0;
}
